短接触旋流反应器混合腔内离散颗粒分布特性的模拟  

Numerical Simulation of Discrete Particle Distribution Characteristics in Mixing Cavity of Quick-contact Cyclone Reactor

作　　者：王振波[1] 张玉春[1] 徐春明[1] 

机构地区：[1]中国石油大学重质油国家重点实验室

出　　处：《化工机械》2014年第3期357-360,373,共5页Chemical Engineering & Machinery

基　　金：国家自然科学基金(21276281);中国石油大学重质油国家重点实验室开放基金(SKLOP201103008)

摘　　要：应用DPM模型对新型催化裂化短接触旋流反应器内的颗粒分布特性进行数值模拟,主要考察混合腔内气、固两相速度与浓度分布的基本特征.模拟结果表明：1～30μm粒径颗粒受到重力场和旋流场的作用,在混合腔内沿气流方向旋转扩散,充满整个混合区域且逐渐螺旋下行;而50、70、100μm粒径的颗粒由于粒径相对较大,不易被气流夹带,在混合腔内的流动更为复杂,浓度分布的不均匀度增大.研究结果为新型反应器的设计和优化提供了重要理论依据.Particle distribution characteristics of the new quick-contact cyclone reactor to be used in FCC were numerically simulated with DPM model,and both velocity and concentration distribution characteristics of gassolid flow in the mixing cavity was investigated.The simulation results show that the 1 ～ 30μm particles affected by gravity and cyclonic fluid field can spread rotatively in gas direction in the mixing cavity and then run downward spiral gradually to fill mixing cavity; and flow patterns of 50μm,70μm and 100μm particles which hardly carried by gas flow in the mixing cavity can become more complicated together with a non-uniform concentration distribution.The research results theoretically provide an important basis for design and optimization of the new reactor.

关 键 词：短接触旋流反应器 DPM模型 数值模拟 分布特性 

分 类 号：TQ052[化学工程]